This is why you should always order new parts for a new design and never, never trust the old guy with the magic parts box. Also why learning to read and compare data sheets skeptically is a fundamental skill.
This sort of thing really annoys me. Part numbers are for use of engineers, not for the marketing dept. If you change the specs, change the part number.
> If you change the specs, change the part number.
They took it from SW.
You know this joke with "Windows is a single platform" ? Or the joke with "use rust if you can compile it" ? Or "your browser version is not supported" ?
Something is going on over a TI. They tried to scrub their old datasheets from the web a few years ago too [1]
[1] - Texas Instruments sent a DMCA takedown to a site archiving data sheets - https://news.ycombinator.com/item?id=25682785 -
354 points by DyslexicAtheist on Jan 8, 2021 | 122 comments
This is fucking dire. Lowering voltage will just lead to early failures for poor clueless designers/repairmen that had old datasheet saved and just assume it will never change but slew rate chance is just "well it works, but suddenly it's worse in certain applications"
Oh, wow, I was expecting from the title that, eh, maybe they changed the process or something, and someone was being a bit fussy. But yeah, no, different part.
Across the board TI is moving to new fabs, new fab processes and 300 mm wafers. So the old tooling is going away and they're adapting legacy designs to the new processes. This changes component behavior, particularly analog stuff, like these op amps.
That's all inevitable and has happened in the semiconductor business before. When it happens, manufacturers are forced to choose; obsolete old parts that can't be indistinguishably reproduced on the new node, or and sell substantially different components under existing SKUs, so they can keep booking orders from high volume customers without disruption.
In this case, the latter is happening. In all probability their high volume customers have already accounted for the PCN because TI told them it was coming years ago, back when the new fab buildout started and the lithography machines were first ordered.
An amusing aside: Look at the list of "applications." Netbooks? Multichannel video transcoders? Scalable platforms?
I've seen this in other TI datasheets. One old general purpose 74HC series logic chip included "E Meters" in its applications.
My hunch is that whoever was assigned to add these "applications" to each data sheet was having some harmless fun.
Another note is that I'm a low profile customer of Digi-Key and Mouser. Both of them send out change notifications on parts that I've ordered in the past.
Dave Jones didn't spare words [1] on how insane it was to have a jellybean component changing specs so significantly, particularly the input voltage from 22V to 18V, the removal of offset trim, and more.
There are better and superior alternative of NE5532 these days. People should just move on. OPA1612 is the king in highest-end audio performance, at least on datasheet paper.
17 comments
[ 2.8 ms ] story [ 38.8 ms ] threadThey took it from SW. You know this joke with "Windows is a single platform" ? Or the joke with "use rust if you can compile it" ? Or "your browser version is not supported" ?
Enshitification reaches everything.
[1] - Texas Instruments sent a DMCA takedown to a site archiving data sheets - https://news.ycombinator.com/item?id=25682785 - 354 points by DyslexicAtheist on Jan 8, 2021 | 122 comments
That's all inevitable and has happened in the semiconductor business before. When it happens, manufacturers are forced to choose; obsolete old parts that can't be indistinguishably reproduced on the new node, or and sell substantially different components under existing SKUs, so they can keep booking orders from high volume customers without disruption.
In this case, the latter is happening. In all probability their high volume customers have already accounted for the PCN because TI told them it was coming years ago, back when the new fab buildout started and the lithography machines were first ordered.
https://youtu.be/22ZmmZ67SMY
----
Summary of changes:
- Input stage changed from NPN to PNP
- Slew rate decreased from 9V/µs to 5V/µs
- Supply voltages absolute ratings decreased from ±22V to ±18V
I've seen this in other TI datasheets. One old general purpose 74HC series logic chip included "E Meters" in its applications.
My hunch is that whoever was assigned to add these "applications" to each data sheet was having some harmless fun.
Another note is that I'm a low profile customer of Digi-Key and Mouser. Both of them send out change notifications on parts that I've ordered in the past.
[1] https://www.youtube.com/watch?v=22ZmmZ67SMY
Turns out no.